let list{} = 1
let list{1} = 1
let list{1, 2} = 1
let list{1, 2, 3} = 1
let list{1, 2, ...tail} = 1

let list{aaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbb, cccccccccccccccccccccccccc} = 1 
let list{aaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbb, cccccccccccccccccccccccccc, ...tail} = 1 
